<template>
  <div>
      <h1>{{title}}</h1>
      <h1>{{msg}}</h1>
      <h1 @click="$emit('childClick',msg)">提示</h1>
      <button @click="sendMsg()">发送Child组件的消息</button>
  </div>
</template>

<script>
  import { ref } from "vue";
  import bus from "vue3-eventbus";
  export default {
    props:{
      title: String
    },
    setup() {
      const msg=ref("我是子组件的值");
      const sendMsg = () =>{
        console.log("发送Child组件的消息")
        bus.emit("getMsg","我是来自Child组件的消息");
      };
      return {
        msg,
        sendMsg
      }
    }
  }

</script>